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The following tips can help you better utilize conductive mica powder:

(1) The conductive function of conductive and anti-static materials is related to conductive fillers, basic resins, additives, solvents, and processing techniques. In coating systems, it is also related to the electrical function of the coated object. Under normal circumstances, when the amount of conductive mica powder increases by 20-25% (weight percentage PWC), the electrical resistivity of the product can reach 105-106 Ω· cm.

(2) Conductive mica powder can be used alone or in combination with other conductive powders (such as conductive titanium dioxide, conductive barium sulfate, etc.). Considering the touch area and shear force of conductive fillers during the processing, generally speaking, the use of sheet-like conductive fillers with conductive mica powder in coatings and ink systems is more effective; In some situations, the combination of two different shapes or particle sizes of conductive powders can produce better conductivity, such as conductive mica powder: conductive titanium dioxide (or conductive barium sulfate)=4:1~10:1. The filling structure of conductive fillers has a direct impact on conductivity, and uneven structures have better conductivity than uniform structures, which can be explained by the size of the touch area. In terms of the increase in conductive powder, the conductivity of the product improves with its increase. When a certain amount (called critical increase or critical concentration) is reached, the conductive function is better, and then the electrical function changes or decreases more steadily.

(3) Conductive mica powder is easily dispersed in aqueous systems. When used in non homogeneous systems, moisten with a similar solvent before stirring, and then add the moist slurry to the system for brief dispersion. The dispersing effect can be improved by selecting methods such as increasing the stirring speed, increasing the dispersing agent, and using two roll and three roll grinding. If a dispersant is used, it will shorten the dispersal time. During the loosening process, the shear force should not be too large, otherwise the conductive powder structure will be damaged. When using ball milling and sand milling methods for grinding, the fineness should be adjusted to shorten the time as much as possible and minimize the damage to the conductive powder structure.

(4) When conductive mica powder is used together with conventional pigments (fillers), the conventional pigments (fillers) should first be pre dispersed through conventional methods, and then briefly dispersed to form conductive powder. Thixotropic agents (such as hydrogenated castor oil derivatives, organic modified bentonite, ultrafine SiO2, etc.) should be added to coatings to improve the anti settling properties of conductive powders. If sedimentation cannot be prevented, flocculants (such as Terrg-P, Anti rerra-203, Texaphor-963, etc.) can be used to control sedimentation. Simply stir to disperse.

Article source: Taishan conductive mica particles

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